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                    2.5  Java运算符
            
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                    8.3  多态
            
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                    8.4  本章练习
            
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                    第九章    抽象类和接口
            
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                    9.1  抽象类
            
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                    9.3  本章练习
            
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<p>&#x2003;&#x2003;&#x5728;&#x901A;&#x5E38;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;&#x8981;&#x4F7F;&#x7528;&#x4E00;&#x4E2A;&#x7C7B;&#x5BF9;&#x8C61;&#xFF08;&#x5B9E;&#x4F8B;&#xFF09;&#x7684;&#x516C;&#x6709;&#x6210;&#x5458;&#x53D8;&#x91CF;&#xFF0C;&#x9700;&#x8981;&#x901A;&#x8FC7;&#x8FD9;&#x4E2A;&#x7C7B;&#x5B9E;&#x4F8B;&#x5316;&#x51FA;&#x5BF9;&#x8C61;&#xFF0C;&#x518D;&#x901A;&#x8FC7;&#x201C;&#x5BF9;&#x8C61;&#x540D;.&#x53D8;&#x91CF;&#x540D;&#x201D;&#x7684;&#x5F62;&#x5F0F;&#x8BBF;&#x95EE;&#x3002;&#x4F5C;&#x4E3A;&#x7A0B;&#x5E8F;&#x5458;&#xFF0C;&#x6709;&#x65F6;&#x9700;&#x8981;&#x5B9A;&#x4E49;&#x4E00;&#x4E2A;&#x7C7B;&#x7EA7;&#x522B;&#x7684;&#x53D8;&#x91CF;&#xFF0C;&#x5B83;&#x7684;&#x4F7F;&#x7528;&#x5B8C;&#x5168;&#x72EC;&#x7ACB;&#x4E8E;&#x8BE5;&#x7C7B;&#x7684;&#x4EFB;&#x4F55;&#x5BF9;&#x8C61;&#xFF0C;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x901A;&#x8FC7;&#x201C;&#x7C7B;&#x540D;.&#x53D8;&#x91CF;&#x540D;&#x201D;&#x7684;&#x5F62;&#x5F0F;&#x8FDB;&#x884C;&#x8BBF;&#x95EE;&#x3002;</p>
<p>&#x2003;&#x2003;&#x5728;&#x7C7B;&#x6210;&#x5458;&#x7684;&#x58F0;&#x660E;&#x524D;&#xFF0C;&#x52A0;&#x4E0A;static&#xFF08;&#x9759;&#x6001;&#x7684;&#xFF09;&#x5173;&#x952E;&#x5B57;&#xFF0C;&#x5C31;&#x80FD;&#x521B;&#x5EFA;&#x51FA;&#x8FD9;&#x6837;&#x7684;&#x9759;&#x6001;&#x7C7B;&#x6210;&#x5458;&#x3002;static&#x6210;&#x5458;&#x6700;&#x5E38;&#x89C1;&#x7684;&#x4F8B;&#x5B50;&#x662F;main&#x65B9;&#x6CD5;&#x3002;&#x56E0;&#x4E3A;&#x5728;&#x7A0B;&#x5E8F;&#x5F00;&#x59CB;&#x6267;&#x884C;&#x65F6;&#x5FC5;&#x987B;&#x8C03;&#x7528;main&#x65B9;&#x6CD5;&#xFF0C;&#x6240;&#x4EE5;&#x5C06;&#x5B83;&#x58F0;&#x660E;&#x4E3A;static&#x3002;</p>
<p>&#x2003;&#x2003;&#x58F0;&#x660E;&#x4E3A;static&#x7684;&#x53D8;&#x91CF;&#x79F0;&#x4E3A;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x6216;&#x7C7B;&#x53D8;&#x91CF;&#x3002;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x901A;&#x8FC7;&#x7C7B;&#x540D;&#x5F15;&#x7528;&#x9759;&#x6001;&#x53D8;&#x91CF;&#xFF0C;&#x4E5F;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x5B9E;&#x4F8B;&#x540D;&#x6765;&#x5F15;&#x7528;&#x9759;&#x6001;&#x53D8;&#x91CF;&#xFF0C;&#x4F46;&#x6700;&#x597D;&#x91C7;&#x7528;&#x524D;&#x8005;&#xFF0C;&#x56E0;&#x4E3A;&#x91C7;&#x7528;&#x540E;&#x8005;&#x5BB9;&#x6613;&#x6DF7;&#x6DC6;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x548C;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;&#x3002;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x662F;&#x8DDF;&#x7C7B;&#x76F8;&#x5173;&#x8054;&#x7684;&#xFF0C;&#x7C7B;&#x7684;&#x6240;&#x6709;&#x5B9E;&#x4F8B;&#x5171;&#x540C;&#x62E5;&#x6709;&#x4E00;&#x4E2A;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x3002;</p>
<p>&#x2003;&#x2003;&#x58F0;&#x660E;&#x4E3A;static&#x7684;&#x65B9;&#x6CD5;&#x79F0;&#x4E3A;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x6216;&#x7C7B;&#x65B9;&#x6CD5;&#x3002;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x8C03;&#x7528;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#xFF0C;&#x8BBF;&#x95EE;&#x9759;&#x6001;&#x53D8;&#x91CF;&#xFF0C;&#x4F46;&#x662F;&#x4E0D;&#x80FD;&#x76F4;&#x63A5;&#x8BBF;&#x95EE;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;&#x548C;&#x5B9E;&#x4F8B;&#x65B9;&#x6CD5;&#x3002;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x4E2D;&#x4E0D;&#x80FD;&#x4F7F;&#x7528;this&#x5173;&#x952E;&#x5B57;&#xFF0C;&#x56E0;&#x4E3A;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x4E0D;&#x5C5E;&#x4E8E;&#x4EFB;&#x4F55;&#x4E00;&#x4E2A;&#x5B9E;&#x4F8B;&#x3002;</p>
<h3 id="741--static&#x5173;&#x952E;&#x5B57;&#x7684;&#x4F7F;&#x7528;">7.4.1  static&#x5173;&#x952E;&#x5B57;&#x7684;&#x4F7F;&#x7528;</h3>
<h4 id="1&#xFF0E;&#x7528;static&#x4FEE;&#x9970;&#x7C7B;&#x7684;&#x6210;&#x5458;&#x53D8;&#x91CF;">1&#xFF0E;&#x7528;static&#x4FEE;&#x9970;&#x7C7B;&#x7684;&#x6210;&#x5458;&#x53D8;&#x91CF;</h4>
<p>&#x2003;&#x2003;&#x7528;static&#x4FEE;&#x9970;&#x7684;&#x7C7B;&#x7684;&#x6210;&#x5458;&#x53D8;&#x91CF;&#x662F;&#x9759;&#x6001;&#x53D8;&#x91CF;&#xFF0C;&#x5BF9;&#x8BE5;&#x7C7B;&#x7684;&#x6240;&#x6709;&#x5B9E;&#x4F8B;&#x6765;&#x8BF4;&#xFF0C;&#x53EA;&#x6709;&#x4E00;&#x4E2A;&#x9759;&#x6001;&#x503C;&#x5B58;&#x5728;&#xFF0C;&#x6240;&#x6709;&#x5B9E;&#x4F8B;&#x5171;&#x7528;&#x4E00;&#x4E2A;&#x53D8;&#x91CF;&#x3002;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x662F;&#x6307;&#x4E0D;&#x7BA1;&#x7C7B;&#x5B9E;&#x4F8B;&#x5316;&#x51FA;&#x591A;&#x5C11;&#x4E2A;&#x5BF9;&#x8C61;&#xFF0C;&#x7CFB;&#x7EDF;&#x4EC5;&#x5728;&#x7B2C;&#x4E00;&#x6B21;&#x8C03;&#x7528;&#x7C7B;&#x7684;&#x65F6;&#x5019;&#x4E3A;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x5206;&#x914D;&#x5185;&#x5B58;&#x3002;&#x5148;&#x6765;&#x770B;&#x4E0B;&#x9762;&#x7684;&#x4F8B;&#x5B50;&#x3002;</p>
<pre><code>public class TestStatic

{

    public static void main(String[] args) 

    {

        Student wangYun = new Student();

        wangYun.avgAge = 22;                           //&#x5C06;Student&#x7C7B;&#x53D8;&#x91CF;&#x7684;&#x503C;&#x8BBE;&#x7F6E;&#x4E3A;22        

        System.out.println(&quot;&#x738B;&#x4E91;&#x6240;&#x5728;&#x73ED;&#x5E73;&#x5747;&#x5E74;&#x9F84;&#x4E3A;&#xFF1A;&quot; + wangYun.avgAge);

        Student liuJT = new Student();

        liuJT.avgAge = 21;                                  //&#x5C06;Student&#x7C7B;&#x53D8;&#x91CF;&#x7684;&#x503C;&#x8BBE;&#x7F6E;&#x4E3A;21        

        System.out.println(&quot;&#x738B;&#x4E91;&#x6240;&#x5728;&#x73ED;&#x5E73;&#x5747;&#x5E74;&#x9F84;&#x4E3A;&#xFF1A;&quot; + wangYun.avgAge);

        System.out.println(&quot;&#x5218;&#x9759;&#x6D9B;&#x6240;&#x5728;&#x73ED;&#x5E73;&#x5747;&#x5E74;&#x9F84;&#x4E3A;&#xFF1A;&quot; + liuJT.avgAge);

    }

}

class Student 

{ 

    public static int avgAge;                                   //&#x7C7B;&#x53D8;&#x91CF;&#xFF0C;&#x5B58;&#x653E;&#x5E73;&#x5747;&#x5E74;&#x9F84;

}
</code></pre><p>&#x2003;&#x2003;&#x7A0B;&#x5E8F;&#x8FD0;&#x884C;&#x7ED3;&#x679C;&#x5982;&#x56FE;7.10&#x6240;&#x793A;&#x3002;</p>
<center><img src="https://labfile.oss.aliyuncs.com/library/textbook-java1/img/d7z/tu7.10.png"></center>
<center>&#x56FE;7.10  &#x7C7B;&#x53D8;&#x91CF;&#x4F7F;&#x7528;</center>  


<p>&#x2003;&#x2003;&#x901A;&#x8FC7;&#x7A0B;&#x5E8F;&#x8FD0;&#x884C;&#x7ED3;&#x679C;&#x53EF;&#x4EE5;&#x770B;&#x51FA;&#xFF0C;&#x6240;&#x6709;Sutdent&#x7C7B;&#x7684;&#x5B9E;&#x4F8B;wangYun&#x548C;liuJT&#x90FD;&#x5171;&#x7528;&#x4E86;&#x9759;&#x6001;&#x53D8;&#x91CF;avgAge&#xFF0C;&#x5F53;&#x7ED9;&#x5176;&#x4E2D;&#x4EFB;&#x4F55;&#x4E00;&#x4E2A;&#x5B9E;&#x4F8B;&#x7684;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x8D4B;&#x503C;&#xFF0C;&#x90FD;&#x662F;&#x5BF9;&#x8FD9;&#x4E00;&#x4E2A;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x8FDB;&#x884C;&#x64CD;&#x4F5C;&#x3002;</p>
<h4 id="2&#xFF0E;&#x7528;static&#x4FEE;&#x9970;&#x7C7B;&#x7684;&#x6210;&#x5458;&#x65B9;&#x6CD5;">2&#xFF0E;&#x7528;static&#x4FEE;&#x9970;&#x7C7B;&#x7684;&#x6210;&#x5458;&#x65B9;&#x6CD5;</h4>
<p>&#x2003;&#x2003;&#x7528;static&#x4FEE;&#x9970;&#x7C7B;&#x7684;&#x6210;&#x5458;&#x65B9;&#x6CD5;&#x8868;&#x793A;&#xFF0C;&#x8BE5;&#x65B9;&#x6CD5;&#x88AB;&#x7ED1;&#x5B9A;&#x4E8E;&#x7C7B;&#x672C;&#x8EAB;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x7C7B;&#x7684;&#x5B9E;&#x4F8B;&#x3002;&#x770B;&#x4E0B;&#x9762;&#x7684;&#x4F8B;&#x5B50;&#x3002;</p>
<pre><code>public class TestStatic2

{

    public static void main(String[] args) 

    {

        Student.showAvgAge();       //&#x8C03;&#x7528;&#x9759;&#x6001;&#x65B9;&#x6CD5;           

        System.out.println(&quot;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x8F93;&#x51FA;&#x6240;&#x5728;&#x73ED;&#x5E73;&#x5747;&#x5E74;&#x9F84;&#x4E3A;&#xFF1A;&quot; + Student.avgAge);

    }

}

class Student 

{

    public static int avgAge = 22;                  //&#x7C7B;&#x53D8;&#x91CF;&#xFF0C;&#x5B58;&#x653E;&#x5E73;&#x5747;&#x5E74;&#x9F84;

    public static void showAvgAge()  //&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x8F93;&#x51FA;&#x73ED;&#x5E73;&#x5747;&#x5E74;&#x9F84;

    {

        System.out.println(&quot;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x8F93;&#x51FA;&#x6240;&#x5728;&#x73ED;&#x5E73;&#x5747;&#x5E74;&#x9F84;&#x4E3A;&#xFF1A;22&quot;);

    }

}
</code></pre><p>&#x2003;&#x2003;&#x7A0B;&#x5E8F;&#x8FD0;&#x884C;&#x7ED3;&#x679C;&#x5982;&#x56FE;7.11&#x6240;&#x793A;&#x3002;</p>
<center><img src="https://labfile.oss.aliyuncs.com/library/textbook-java1/img/d7z/tu7.11.png"></center>
<center>&#x56FE;7.11  &#x9759;&#x6001;&#x65B9;&#x6CD5;&#x4F7F;&#x7528;</center>  
&#x2003;&#x2003;&#x6CE8;&#x610F;&#xFF0C;&#x5728;TestStatic2&#x7A0B;&#x5E8F;&#x7684;main&#x65B9;&#x6CD5;&#x4E2D;&#xFF0C;&#x90FD;&#x662F;&#x901A;&#x8FC7;&#x201C;&#x7C7B;&#x540D;.&#x9759;&#x6001;&#x53D8;&#x91CF;&#x540D;&#x201D;&#x548C;&#x201C;&#x7C7B;&#x540D;.&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x540D;&#x201D;&#x7684;&#x5F62;&#x5F0F;&#x8BBF;&#x95EE;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x548C;&#x8C03;&#x7528;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x7684;&#x3002;&#x901A;&#x8FC7;&#x201C;&#x7C7B;&#x5B9E;&#x4F8B;.&#x9759;&#x6001;&#x53D8;&#x91CF;&#x201D;&#x548C;&#x201C;&#x7C7B;&#x5B9E;&#x4F8B;.&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x201D;&#x4E5F;&#x53EF;&#x4EE5;&#x8BBF;&#x95EE;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x548C;&#x8C03;&#x7528;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#xFF0C;&#x4F46;&#x4E0D;&#x63A8;&#x8350;&#x4F7F;&#x7528;&#x3002;

#### 3&#xFF0E;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x4E0D;&#x80FD;&#x64CD;&#x4F5C;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;

&#x2003;&#x2003;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x53EF;&#x4EE5;&#x64CD;&#x4F5C;&#x9759;&#x6001;&#x53D8;&#x91CF;&#xFF0C;&#x4E0D;&#x80FD;&#x64CD;&#x4F5C;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x4E0B;&#x9762;&#x7684;&#x4F8B;&#x5B50;&#x770B;&#x51FA;&#x3002;

```
public class Student 

{

    public int avgAge = 22;                           //&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;&#xFF0C;&#x5B58;&#x653E;&#x5E73;&#x5747;&#x5E74;&#x9F84;

    public static void showAvgAge()  //&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x8C03;&#x7528;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;&#x2014;&#x2014;&#x7F16;&#x8BD1;&#x51FA;&#x9519;

    {

        System.out.println(&quot;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x8F93;&#x51FA;&#x6240;&#x5728;&#x73ED;&#x5E73;&#x5747;&#x5E74;&#x9F84;&#x4E3A;&#xFF1A;&quot; + avgAge);

    }

}
```

&#x2003;&#x2003;&#x7F16;&#x8BD1;&#x65F6;&#x62A5;&#x9519;&#xFF0C;&#x5982;&#x56FE;7.12&#x6240;&#x793A;&#x3002;

<center><img src="https://labfile.oss.aliyuncs.com/library/textbook-java1/img/d7z/tu7.12.png"></center>
<center>&#x56FE;7.12  &#x9759;&#x6001;&#x65B9;&#x6CD5;&#x8C03;&#x7528;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF; </center>  
### 7.4.2  Java&#x9759;&#x6001;&#x5757;  

&#x2003;&#x2003;&#x7B2C;6&#x7AE0;&#x5B66;&#x4E60;&#x4E86;&#x5BF9;&#x8C61;&#x7684;&#x521D;&#x59CB;&#x5316;&#x8FC7;&#x7A0B;&#xFF0C;&#x5728;&#x4F7F;&#x7528;new&#x5173;&#x952E;&#x5B57;&#x521B;&#x5EFA;&#x5E76;&#x521D;&#x59CB;&#x5316;&#x5BF9;&#x8C61;&#x7684;&#x8FC7;&#x7A0B;&#x4E2D;&#xFF0C;&#x5177;&#x4F53;&#x7684;&#x521D;&#x59CB;&#x5316;&#x5206;&#x4E3A;&#x4EE5;&#x4E0B;4&#x6B65;&#x3002;

&#x2003;&#x2003;&#xFF08;1&#xFF09;&#x7ED9;&#x5BF9;&#x8C61;&#x7684;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;&#x5206;&#x914D;&#x7A7A;&#x95F4;&#xFF0C;&#x9ED8;&#x8BA4;&#x521D;&#x59CB;&#x5316;&#x6210;&#x5458;&#x53D8;&#x91CF;&#x3002;

&#x2003;&#x2003;&#xFF08;2&#xFF09;&#x6210;&#x5458;&#x53D8;&#x91CF;&#x58F0;&#x660E;&#x65F6;&#x7684;&#x521D;&#x59CB;&#x5316;&#x3002;

&#x2003;&#x2003;&#xFF08;3&#xFF09;&#x521D;&#x59CB;&#x5316;&#x5757;&#x521D;&#x59CB;&#x5316;&#x3002;

&#x2003;&#x2003;&#xFF08;4&#xFF09;&#x6784;&#x9020;&#x65B9;&#x6CD5;&#x521D;&#x59CB;&#x5316;&#x3002;

&#x2003;&#x2003;&#x63A5;&#x4E0B;&#x6765;&#x5C06;&#x4F1A;&#x5148;&#x4ECB;&#x7ECD;&#x4EC0;&#x4E48;&#x662F;Java&#x9759;&#x6001;&#x5757;&#xFF0C;&#x5E76;&#x7ED3;&#x5408;&#x5BF9;&#x8C61;&#x7684;&#x521D;&#x59CB;&#x5316;&#x8FC7;&#x7A0B;&#xFF0C;&#x4ECB;&#x7ECD;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x3001;&#x9759;&#x6001;&#x5757;&#x7684;&#x6267;&#x884C;&#x987A;&#x5E8F;&#x3002;

&#x2003;&#x2003;&#x9759;&#x6001;&#x5757;&#x7684;&#x8BED;&#x6CD5;&#x5F62;&#x5F0F;&#x5982;&#x4E0B;&#x3002;


```
static

{

    &#x8BED;&#x53E5;&#x5757;

}
```


&#x2003;&#x2003;Java&#x7C7B;&#x9996;&#x6B21;&#x88C5;&#x5165;JVM&#x65F6;&#xFF0C;&#x4F1A;&#x5BF9;&#x9759;&#x6001;&#x53D8;&#x91CF;&#xFF08;&#x542B;&#x9759;&#x6001;&#x5757;&#xFF09;&#x6216;&#x65B9;&#x6CD5;&#x8FDB;&#x884C;&#x4E00;&#x6B21;&#x521D;&#x59CB;&#x5316;&#xFF0C;&#x65B9;&#x6CD5;&#x4E0D;&#x88AB;&#x8C03;&#x7528;&#x662F;&#x4E0D;&#x4F1A;&#x6267;&#x884C;&#x7684;&#xFF0C;&#x5C31;&#x662F;&#x8BF4;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x548C;&#x9759;&#x6001;&#x5757;&#x662F;&#x5728;&#x7C7B;&#x9996;&#x6B21;&#x88C5;&#x8F7D;&#x8FDB;JVM&#x65F6;&#x88AB;&#x6267;&#x884C;&#x7684;&#x3002;

&#x2003;&#x2003;&#x8FD0;&#x884C;&#x5982;&#x4E0B;&#x7684;&#x7A0B;&#x5E8F;&#xFF0C;&#x8FD0;&#x884C;&#x7ED3;&#x679C;&#x5982;&#x56FE;7.13&#x6240;&#x793A;&#x3002;


```
public class Student 

{

    private static String staticName = &quot;&#x9759;&#x6001;&#x59D3;&#x540D;&quot;;       //&#x9759;&#x6001;&#x53D8;&#x91CF;

    private String stuName = &quot;&quot;;                                    //&#x5B66;&#x751F;&#x59D3;&#x540D;&#x2014;&#x2014;&#x79C1;&#x6709;&#x53D8;&#x91CF;

    //&#x4F7F;&#x7528;&#x9759;&#x6001;&#x521D;&#x59CB;&#x5316;&#x5757;&#x521D;&#x59CB;&#x5316;

    static

    {       

        System.out.println(&quot;***&#x4F7F;&#x7528;&#x9759;&#x6001;&#x521D;&#x59CB;&#x5316;&#x5757;&#x521D;&#x59CB;&#x5316;***&quot;);

        System.out.println(&quot;&#x9759;&#x6001;&#x5757;&#x91CC;&#x663E;&#x793A;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x503C;&#xFF1A;&quot; + staticName);

    }

    //&#x4F7F;&#x7528;&#x521D;&#x59CB;&#x5316;&#x5757;&#x521D;&#x59CB;&#x5316;

    {       

        this.stuName = &quot;&#x96F7;&#x9759;&quot;;

        System.out.println(&quot;***&#x4F7F;&#x7528;&#x521D;&#x59CB;&#x5316;&#x5757;&#x521D;&#x59CB;&#x5316;***&quot;);

        System.out.println(&quot;&#x666E;&#x901A;&#x5757;&#x91CC;&#x663E;&#x793A;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;&#x503C;&#xFF1A;&quot; + stuName);

        System.out.println(&quot;&#x666E;&#x901A;&#x5757;&#x91CC;&#x663E;&#x793A;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x503C;&#xFF1A;&quot; + staticName);

    }

    //&#x6784;&#x9020;&#x65B9;&#x6CD5;&#xFF0C;&#x7528;&#x6237;&#x521D;&#x59CB;&#x5316;&#x5BF9;&#x8C61;&#x7684;&#x6210;&#x5458;&#x53D8;&#x91CF;

    public Student(String name){         

        this.stuName = name;

        System.out.println(&quot;***&#x4F7F;&#x7528;&#x6709;&#x53C2;&#x6784;&#x9020;&#x51FD;&#x6570;&#x521D;&#x59CB;&#x5316;***&quot;);

        System.out.println(&quot;&#x6784;&#x9020;&#x65B9;&#x6CD5;&#x91CC;&#x663E;&#x793A;&#x5B9E;&#x4F8B;&#x53D8;&#x91CF;&#x503C;&#xFF1A;&quot; + stuName);

        System.out.println(&quot;&#x6784;&#x9020;&#x65B9;&#x6CD5;&#x91CC;&#x663E;&#x793A;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x503C;&#xFF1A;&quot; + staticName);

    }

    public static void main(String[] args) 

    {

        Student stu = new Student(&quot;&#x738B;&#x4E91;&quot;);

    }

}
```

<center><img src="https://labfile.oss.aliyuncs.com/library/textbook-java1/img/d7z/tu7.13.png"></center>
<center>&#x56FE;7.13  &#x4F7F;&#x7528;&#x9759;&#x6001;&#x5757;&#x521D;&#x59CB;&#x5316;&#x53D8;&#x91CF;</center>  


<p>&#x2003;&#x2003;&#x901A;&#x8FC7;&#x4E0A;&#x9762;&#x7684;&#x4F8B;&#x5B50;&#x53EF;&#x4EE5;&#x770B;&#x51FA;&#xFF0C;&#x9759;&#x6001;&#x53D8;&#x91CF;&#x548C;&#x9759;&#x6001;&#x5757;&#x90FD;&#x662F;&#x5728;&#x7C7B;&#x5B9E;&#x4F8B;&#x5316;&#x5BF9;&#x8C61;&#x524D;&#x88AB;&#x6267;&#x884C;&#x7684;&#x3002;</p>

                                
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